Prefix 314-326 — Saint Louis, MO

NANPA CO code assignment, current as of July 28, 2026.

The 314-326 prefix belongs to area code 314 and is anchored to the Saint Louis rate center (MO). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

Saint Louis is part of the St. Louis, MO-IL Metropolitan Statistical Area. For routing purposes it sits in LATA 520. Numbers here keep Central time.

NANPA's central-office code records list T-MOBILE USA, INC. (OCN 6529) as the code holder, assigned August 8, 2013. Because 314-326 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.

Caller ID showing 314-326 is not proof the call came from Saint Louis: spoofing and porting both detach numbers from their origin. To verify a caller, hang up and dial the organization's published number, and report suspicious calls to the FTC.

Neighboring prefixes

FAQ

Where is 314-326 located?

The prefix is assigned to the Saint Louis rate center in MO, area code 314. It is part of the St. Louis, MO-IL Metropolitan Statistical Area.

Which company owns 314-326 numbers?

T-MOBILE USA, INC. holds the code, but the prefix is pooled — individual thousands-blocks can be assigned to other carriers, and numbers may be ported to any provider.

Is a call from 314-326 safe to answer?

The prefix itself says nothing about the caller. Legitimate Saint Louis businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.